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Unilock Construction in Sunnyvale, CA | Ashford Contractors
We install and repair Unilock paver systems across Sunnyvale, from Brussels Block patios on 1950s ranchers to U-Cara retaining walls on sloped infill lots. As a Sunnyvale General Contractor, we handle the full scope of paver and hardscape projects. Ashford Contractors is an independent Unilock service provider, not manufacturer-affiliated or authorized, and the difference here is that our crews know how Sunnyvale’s slab-on-grade foundations, permit scrutiny, and winter drainage patterns shape every paver project. Unilock work in Sunnyvale fails most often when the base and drainage get skimped, not when the pavers themselves fail. Call (877) 752-3868 for a free estimate on your Unilock patio, driveway, or retaining wall.
We also handle full-scope Unilock sales & service for homeowners who want one contractor managing hardscape alongside roofing, windows, or an ADU addition.
Why Sunnyvale Residents Choose Us for Unilock Service
Sunnyvale’s housing stock splits between post-war ranchers in 94086 and 94087 and high-density infill replacing those same homes. That means Unilock work here rarely follows a clean template. We’ve installed Unilock pavers around new ADU foundations, routed drainage swales between a 1950s slab and a second-story addition’s shear walls, and rebuilt paver aprons where utility trenching cut through the original base. Glen Mossier, owner at Ashford Contractors, trained in construction technology at Skyline College and spent two decades learning what happens when a paver system’s base and drainage get treated as an afterthought. He’s pulled up enough sand-washed patios in San Mateo County to know the failure starts underground, not on the surface. We also provide Unilock service in Loyola and nearby communities with similar drainage challenges.
We source genuine Unilock pavers, wall units, edge restraints, and polymeric joint sand because color lot matching and dimensional tolerances are what keep a visible Unilock system looking right after three wet seasons. We’re independent, which means our recommendation is based on what will actually hold up on your lot, not on moving a manufacturer’s product line. If your base is the problem, we’ll tell you that plainly. Build it right the first time, and you won’t be rebuilding it in ten years.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Sunnyvale
- Efflorescence blooming on Brussels Block and Beacon Hill pavers. Sunnyvale’s dry season from May to October means bases that aren’t properly compacted before the late-fall rains arrive will trap moisture under the pavers. When drainage falls toward the house instead of away, white powdery staining blooms across the surface by January. We see it most on slab-on-grade ranchers in 94086 and 94087 where the original grade slopes toward the foundation.
- Joint sand washout and edge migration after winter rain. Sunnyvale’s concentrated wet season from late fall through spring will pull polymeric sand out of joints that were never set into a properly restrained edge. The failure shows up first at driveway aprons and patio borders, where the edge restraint was skipped or cut short. Replacing washed-out sand without fixing the edge means you’ll be redoing it next spring.
- Paver settlement and lippage over expansive clay subgrade. When a base depth is skimped during a fast ADU or second-story addition project, the pavers settle unevenly and create a trip hazard at walkway transitions. Sunnyvale’s original rancher lots often sit on clay subgrade that moves with moisture swings, and a thin base will telegraph that movement straight to the surface as lippage.
- U-Cara wall block face displacement or bulging. Retaining walls built into sloped Sunnyvale backyards fail when geogrid and drainage aggregate are omitted. We’ve rebuilt U-Cara walls where the face blocks pushed outward after the first wet season because water pressure built up behind the wall with nowhere to drain.
- Utility trench settlement cutting through paver areas. With so many Sunnyvale homeowners adding ADUs or second-story additions on oversized rancher lots, utility trenching now crosses what used to be clean paver runs. The backfilled trench settles differently than the surrounding base, and the paver line dips or heaves at exactly that crossing.
Unilock Service in Sunnyvale: What Local Conditions Mean for Your Equipment
Here’s the part most paver installers won’t tell you, and it’s specific to this city. Because so many original Sunnyvale ranchers sit on oversized lots that now carry a permitted ADU or second-story addition, Unilock hardscape work here frequently has to route drainage and edge restraints around new foundation lines and utility trenching. That’s a coordination problem that doesn’t exist on a plain lot replacement in Cupertino or Unilock in Santa Clara. On a 1950s rancher in the 94087 tract, our crew tore out a heaved, sand-washed patio and reinstalled Unilock Brussels Block over a properly compacted, geotextile-separated base pitched away from the slab. The homeowner was adding an ADU in back, so we coordinated the paver layout and drainage swale around the new foundation and utility runs, and the finished patio now sheds the winter rain instead of pooling against the house. A contractor who only knows pavers won’t coordinate with the foundation crew, the trenching crew, or the building inspector standing in your backyard checking Title 24 compliance. We do, because we also build the addition.
Serving all Sunnyvale ZIP codes: 94085, 94086, 94087, and 94088.
Unilock Models & Products We Service in Sunnyvale
We install and repair the full range of Unilock systems you’ll find across Sunnyvale backyards and driveways. On the paver side, that includes Brussels Block, Beacon Hill Flagstone, and Town Hall, each with different joint patterns, surface textures, and load ratings. On the wall side, the U-Cara retaining wall system is what we most often rebuild when geogrid or drainage aggregate was skipped. We install genuine Unilock pavers, wall units, edge restraints, and polymeric joint sand rather than off-brand lookalikes, because color lot matching and dimensional tolerances are what keep the system looking right as it ages. When a base or drainage failure is the real cause, we tell owners plainly: re-laying with proper base and drainage often beats patching, and full replacement beats repeated spot fixes. For Sunnyvale turnaround, we work with local Unilock distributors to keep common Brussels Block and Beacon Hill color lots available quickly, which shortens repair timelines in 94086 and 94087.
See the difference
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AfterUnilock Service Pricing in Sunnyvale
Paver work in Sunnyvale prices out based on the scope of excavation, base depth, access, and whether you’re working around new construction. Here are the ranges you should expect for the Unilock services most owners in Sunnyvale call us about:
| Service | Price Range |
|---|---|
| Paver Patio Installation | $3,500 – $11,000 |
| Paver Driveway Installation | $7,000 – $18,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Driveway Sealing | $250 – $700 |
What drives the cost on a Unilock job in Sunnyvale is almost always what’s under the pavers, not the pavers themselves. A patio that needs 8 inches of compacted base and geotextile separation because the subgrade is expansive clay will cost more than a straightforward re-lay on stable ground. Our free estimate includes a look at your existing base condition, drainage path, and edge restraint, so you get a written line-item quote, not a mystery number. Call (877) 752-3868 to schedule yours.
Serving Sunnyvale, CA — Our Local Coverage Area
We’re based in the Sunnyvale area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Sunnyvale
Most paver patios and walkways in Sunnyvale don’t require a building permit, but retaining walls over 3 feet, driveway replacements with significant grade changes, and any work tied to a new ADU or addition do. We pull permits when they’re required and coordinate with Sunnyvale’s building department on the drainage and structural details inspectors look for. Call (877) 752-3868 if you’re unsure about your project.
That’s efflorescence, and in Sunnyvale it shows up when a dry-season base wasn’t fully compacted and winter moisture wicks up through the pavers. The fix is usually a drainage correction and sometimes a re-lay over a properly compacted, geotextile-separated base. We diagnose it by looking at where the staining clusters, which usually points to the low spot in your drainage pattern.
Yes, if the concrete is structurally sound and we can pitch the paver surface away from your foundation. Sunnyvale’s slab-on-grade ranchers often have driveways that have settled or cracked, and if the underlying slab is moving, the pavers will move with it. We’ll tell you whether an overlay will hold or whether the concrete needs to come out first. Call (877) 752-3868 for an honest assessment.
Brussels Block has a tumbled, rounded edge that hides wear and feels softer underfoot, while Beacon Hill Flagstone has a flatter, more linear face with tighter joints. For Sunnyvale backyards where the patio sits close to a slab-on-grade foundation and needs a crisp drainage edge, Beacon Hill’s tighter joints and flatter profile shed water faster. For larger, more organic patio shapes, Brussels Block’s tolerance for slight base movement is a real advantage. We’ll show you samples in the color lot you’d actually receive.
You don’t skip the geogrid and you don’t skip the drainage aggregate. A U-Cara wall on a Sunnyvale slope needs a properly engineered base, geogrid layers tied back into the retained soil, and a drainage column behind the wall that lets water escape. Walls that bulge after the first winter almost always lack one of those three things. We rebuild them right, and we pull the permit when the wall height requires it. Call (877) 752-3868 for a wall assessment.
Service Areas Near Sunnyvale
We run Unilock crews throughout Sunnyvale and the surrounding mid-Peninsula. You’ll see our trucks in Foster City, Redwood Shores, Belmont, San Mateo, and San Carlos, and we’re glad to bring the same paver and wall expertise to nearby cities. If you’re in the South Bay, we also provide Unilock service in Cupertino and Unilock service in Milpitas. For the full list of streets and neighborhoods we cover, see our Sunnyvale service area page.
Book Your Unilock Service in Sunnyvale Today
We schedule free estimates across 94085, 94086, 94087, and 94088 every week, and we can often get a crew out to assess your paver or wall damage within a few days. Call (877) 752-3868 to get on the schedule.
Written by Glen Mossier, Owner at Ashford Contractors, serving Sunnyvale and the mid-Peninsula.